Image encoder, image decoder, image encoding method, image decoding method and image encoding/decoding system
US6404815B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1999 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Jan 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An efficient video encoder and a compression encoding of an input picture includes motion compensated prediction means for performing interframe motion detection. The motion compensated prediction means has a motion detector and a motion compensator. The motion detector includes an image transforming unit that transforms a reference picture portion into a picture portion having a predefined shape. The motion compensator includes a pel determinator for determining integer pels of real sample points of the transformed reference picture portion that corresponds to an integer pel of the input picture block according to the motion parameters supplied from the motion detector as a result of the comparison so as to supply prediction picture data. The video encoder and a decoder having a motion compensator that performs operations similar to the video encoder are combined to form a video encoding and decoding system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.